I feel like it wouldn't be my place to say anything to the wife. The co-worker would be different if she's a true friend and not a complete slut that sleeps around the company or circle of friends. Some women enjoy the attention they receive weather it be positive or negative and those are the ones I consider damaged goods. I dnt support cheating and have never done so, I do have friends that have done it and I didn't say anything cuz it was not my place. I would tell them dnt bring the girls around me cuz if they ever got suspicious and ask I wouldn't lie to them, but I wouldn't go out of my way to tell them either.
I look at it this way, if u are stupid enough to cheat u are stupid enough to get caught. If I were to ever give into temptation and cheat u better believe I'm not telling bacon lmao j/k!!!!